Rod-packing for air-brakes



(No M60161. v 2 Sheets-Sheet 1.

P. D. TOUGEY.

- ROD PACKING FOR AIR BRAKES. No. 579.616. I Patented Mar. 1897.

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, F. D. TOUGEY. Y ROD PACKING FOR AIR BRAKES.

No. 579,616. PatentedMar. 30 1897.

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NITED STATES Fries.

FERRIS D. TOUOEY, OF DULUTH, MINNESOTA, ASSIGNOR OF THREE-FOURTHS TO FREDERICK O. JOHNSON, OF MINNEAPOLIS, MINNESOTA.

ROD-PACKING FOR AIR-BRAKES.

SPECIFICATION forming part of Letters Patent No. 579,616, dated March 30, 1897. Application filed April 13, 1896. $eria1ll0. 587,391. [No model.)

To all whom it may concern:

Be it known that I, FERRIS D. ToUoEY, of the city of Duluth, county of St. Louis, State of Minnesota, have invented certain new and useful Improvements in Rod-Packin g for Air- Brakes, of which the following is a specification.

This invention relates to improvements in packings for the piston-rods of steam-engines or air-brakes, particularly the latter; and the objects I have in view are to provide a simple and inexpensive packing that may be readily applied'to any piston-rod and that will make a steam or air tight joint about the piston-rod, while permitting the requisite freedom of movement to said rod.

To these ends the invention consists generally in a rod-packing of the construction and combination of parts hereinafter described, and particularly pointed out in the claims.

The invention will be more readily understood by reference to the accompanying drawings, in which Figure 1 is a longitudinal section of my improved piston-rod packing. Fig. 2 shows a gland and an adjusting-screw arranged within the gland. Fig. 3 is a detail elevation showing the cut packing-rings and the clampin g-spring therefor. Fig. at shows a different arrangement of cut packing-ring.

In the drawings, 2 represents a piston-rod or other reciprocating rod of any ordinary size and arrangement.

3 represents a stuffing-box which is made separately from the cylinder-head, as shown in Fig. 1, or is formed on the cylinder-head, as shown in Fig. 2.

The stuffing-box when formed separately is provided with a screw-thread 5, as shown in Fig. 1, by means of which it may be secured to the cylinder-head. Two solid rings 9 and 11 are placedupon the piston rod within the stuffing-box. The face of the ring 9 which is toward the bottom of the cavity or stuffing-box rests upon springs 13, and I prefer to provide suitable cavities in the face of the ring to receive the ends of the springs 13 and hold them in position. The ring 9 is preferably rectangular in cross -section, as shown in Fig. 1, and its face that is toward the ring 11 is ground so as to be perfectly smooth, and is at a right angle to the axis of the rod. The face of the ring 11 which is toward the ring 9 is also ground smooth, as is the opposite face. The ring 11 is also preferably provided with a projection or sleeve 15, formed integrally with the ring and extending toward the outer end of the stuffing-bo'x or cavity wi thin which the packing is placed, as shown in each of the drawings. A screw-ring 17, having its inner end ground, is screwed into the end of the studing-box, and its inner end comes in contact with one face of the ring 11, whereby a ground joint is formed between the screw-rin g 17 and the ring 11. Arranged between the two rings 9 and 11 are cut packing-rings, which encircle the piston-rod and are provided with means for clamping them closely upon the surface of such piston-rod. Any preferred construction of out rings may be used for this purpose. The construction shown in Fig. 1, and which I prefer to employ, consists of the two rings 19 and 21, the ring 19 being rectangular in cross-section and the ring 21 being of L shape in cross-section. These rings are arranged to break joints with each other, as shown in Fig. 4, and surrounding them is a clamping-spring 23, which clamps them closely upon the piston-rod.

The faces of the rings 19 and 21 are ground so as to be perfectly smooth, and they are at right angles to the axis of the piston-rod, and thereby form ground joints with the rings 9 and 11.

By means of the screw-ring 17 the tension upon the follower-springs 13 and the parts of the packing may be adjusted as desired. With this construction an absolutely tight packing is obtained, and I do away with all ballsurfaces or other irregular or difficult devices to construct.

In Fig. 2 a plain gland is used with an adjustable screw-ring arranged inside thereof having its inner end engaging the ring 11, thereby adapting my packing for use in any stuffing-box after boring out and threading the hole in the gland to receive the screwring.

In Figs. 2 and 4 I have shown a different arrangement of the cut rings. As here shown,

three series of rectangular rings 19 are used, one series being arranged outside of another, and the third series being arranged by the side of the others, and the three series being arranged to break joints, as shown in Fig. 4-.

It will be seen that in each instance the packing is formed of plane rings whose ground surfaces are at right angles to the axis of the piston-rod. These rings are easy of construction and they wear in a true and uniform manner. Hence they do not get out of true and the packing always remains tight. As before stated, I may substitute other out packing-rings in place of the packing-rings 19, 19, and 21, herein shown and'described.

Having thus described my invention, I claim as new and desire to see'u re by Letters Patent- 1. The combination w ith the piston-rod and stuffing or packing box, of a follower packingring 9, arranged upon said rod, and having its outer end or face perpendicular to the axis of said rod, a spring or springs to force said ring outward, a packing-ring 11 having its inner and outer ends or faces perpendicular to said rod and having an extension 15 fitting upon said rod, a suitable metallic packing upon said rod between the perpendicular faces of said rings 9 and 11, a screw-ringli secured to said stuffing-box and provided with a central opening larger than the diameter of the sleeve 15 and having its innerend perpendicular to the axis of the piston-rod and adapted to engage the outer end or face of the ring 11, and a threaded locking-ring adapted to screw upon the outer end of the ring 17 and against the end of the stuffing-box, whereby the threads are made air or steam tight and the ring 1? locked, substantially as described.

2. The eombination,with the piston-rod and the stuffing or packing box, of the follower packing-ring 9, fitting upon said rod, and havin g its outer end or face perpendicular to the axis of said rod, a spring or springs engaging said ring and forcing it outward, the paekin gring 1l having its inner and outer ends or faces perpendicular to said rod and having a sleeve or extension 15 fitting upon said rod, a suitable metallic packing fitting uponsaid rod between the per iiendicular faces of said rings 9 and 11, and a threaded ring 17 screwed into the gland of said stuffing-box and having its inner end engaging the perpendicular face of said ring 11, said ring being provided with a central opening larger than the diameter of said sleeve 15, whereby said sleeve or extension is permitted lateral movement with in said ring, substantially as described.

In testimony whereof I have hereunto set my hand this 9th day of March, A. D. 1896.

FERRIS D. TOUOEY. In presence of- C. G. I'IAWLEY, M. E. GOOLEY. 

